Collaborative communication protocols for wireless networks

在许多信息处理应用中，无线网络使用分组的多跳转发来实现对数据的无处不在的访问。由于可用的能源和频谱资源有限，并为这些网络不断增加的用户提供支持，人们正在寻求更复杂的传输和网络技术。然而，后者通常被设计为独立的实体。此外，无线网络设计的分层方法在具有时变信道的无线电系统中也不能很好地工作。在无线网络社区中，越来越多的证据表明，只有使用协作算法的跨层设计才能满足对无线网络的严格性能要求。 为了实现无线网络的能量和带宽高效性能，该方案寻求设计无线网络(WN)体系结构和协议，以实现协作通信策略，以允许WN节点在资源分配中进行协作。我们的重点是网络级别的节能机会，重点是多跳传输、拓扑控制和路由级别的问题。具体地说，该方案考虑了在WN中部署协作节点的能量高效信息传播，这些协作节点通过调整其传输范围来最小化网络中的总传输功率。所提出的协议将利用通过自适应传输功率而产生的拓扑多样性，并利用网络编码的优点。 这项研究将影响新的无线网络体系结构的发展方向，并将适用于从无线传感器网络(WSNs)到蜂窝系统的任何无线电系统。该框架将协作通信和网络编码与功率控制相结合，构成了一种有效的无线网络运行机制。该研究计划提供了在具有强大工业联系的实验室环境中培训高素质研究人员的机会，在那里，通过在WSN平台上实施协议，学生将获得宝贵的实践经验。

In many information processing applications, wireless networks enable ubiquitous access to data using multi-hop forwarding of packets. Because of limited energy and spectrum resources available and to provide support for the ever increasing number of users of these networks, more sophisticated transmissions and network technologies are being pursued. However, the latter often are designed as separate entities. Also, the layered approach to wireless network design has not worked well in radio systems with time-varying channels. In the wireless network community, there is more and more evidence that stringent performance requirements for wireless networks can only be met through a cross-layer design using cooperative algorithms. To achieve energy and bandwidth efficient performance of wireless networks, this proposal seeks to design wireless network (WN) architectures and protocols that implement cooperative communication strategies to allow the WN nodes to collaborate in the assignment of resources. Our focus is on network level opportunities for energy conservation, with emphasis on the multi-hop transmissions, topology control and routing-level issues. Specifically, the proposal considers energy efficient information dissemination in WNs deploying co-operating nodes which, by adjusting their transmission ranges, minimize the total transmitted power in the network. The proposed protocols will take advantage of topological diversity created by adapting the transmission power and exploit the benefits of network coding. The research will impact the direction of the development of new radio network architectures and will be applicable to any radio system from wireless sensor networks (WSNs) to cellular systems. The proposed framework constitutes an effective mechanism that integrates cooperative communications and network coding with a power control for power efficient WN operation. The research program provides opportunities to train highly qualified research personnel in a laboratory setting with strong industrial links where, through implementation of the protocols on a WSN platform, students will gain valuable hands on experience.